/*
 * Copyright 2002-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.core

import org.junit.Test

import org.hamcrest.CoreMatchers.`is`
import org.hamcrest.MatcherAssert.assertThat
import org.springframework.util.ReflectionUtils

/**
 * Tests for KotlinReflectionParameterNameDiscoverer
 */
class KotlinReflectionParameterNameDiscovererTests {

    private val parameterNameDiscoverer = KotlinReflectionParameterNameDiscoverer()

    @Test
    fun getParameterNamesOnInterface() {
        val method = ReflectionUtils.findMethod(MessageService::class.java, "sendMessage", String::class.java)!!
        val actualParams = parameterNameDiscoverer.getParameterNames(method)
        assertThat(actualParams, `is`(arrayOf("message")))
    }

    @Test
    fun getParameterNamesOnClass() {
        val method = ReflectionUtils.findMethod(MessageServiceImpl::class.java, "sendMessage", String::class.java)!!
        val actualParams = parameterNameDiscoverer.getParameterNames(method)
        assertThat(actualParams, `is`(arrayOf("message")))
    }

    @Test
    fun getParameterNamesOnExtensionMethod() {
        val method = ReflectionUtils.findMethod(UtilityClass::class.java, "identity", String::class.java)!!
        val actualParams = parameterNameDiscoverer.getParameterNames(method)!!
        assertThat(actualParams, `is`(arrayOf("\$receiver")))
    }

    interface MessageService {
        fun sendMessage(message: String)
    }

    class MessageServiceImpl {
        fun sendMessage(message: String) = message
    }

    class UtilityClass {
        fun String.identity() = this
    }
}
